Only install fonts in graphical installs.

nix/configuration/roles/fonts/default.nix

@@ -8,6 +8,7 @@
 {
   imports = [ ];
 
+  config = lib.mkIf config.me.graphical {
     fonts = {
       enableDefaultPackages = false;
       packages = with pkgs; [
@@ -24,4 +25,5 @@
         useEmbeddedBitmaps = true;
       };
     };
+  };
 }